Refrigeration



Julie 8, 1943. J. A. TAYLOR REFRIGERATION Filed. Sept. 17, 1941 M OR.

910M IAQATTORNEY Patented June '8, 1943 nnrardnna'rrou John A. Taylor, Evansville, Ind, assignor to Serve], Inc., New York, N. Y., a corporation of Delaware Application September 17, 1941 Serial No. 411,094

'7 Claims. (01. 62-179) My invention relates to refrigeration and more particularly to a refrigeration system employing evaporation of refrigerant 'fluid in the presence of inert gas, the liquid refrigerant fluid being supplied by a plurality of condensers or condenser sections and brought into the presence of the inert gas at different elevations. It is an object of the invention to carry out precooling of liquids from both condensers.

The single figure of the drawing shows more or less diagrammatically a refrigeration system embodying the invention. A generator II) has a horizontal portion divided into chambers II and l2. The lower end of a stand pipe I3 is connectedto chamber l2. The lower end of a vapor liquid lift conduit l i projects downward into generator chamber H. M is connected to the upper part of stand pipe 13. Within generator chambers ii and I2 is a flue i5. A gas burner i6 is arranged so that its flame is projected into the lower end of flue l5.

Generator chamber i2 is connected by a conduit IT, a liquid heat exchanger, and a conduit I9 and the lower end of a conduit to the upper end of an absorber coil 2|. The lower end of absorber coil 2| is connected to an absorber vessel 22. The bottom of absorber vessel -22 is connected by a conduit 23, liquid heat exchanger l8, and a conduit 24 to generator chamber II.

The upper end of absorber coil 2| is-connected by a conduit 20, the outer passage of gas heat exchanger 25, and a conduit 26 to the lower end of an evaporator coil 21. The evaporator coil The upper end of conduit 21 is located in a thermally insulated refrigerator storage compartment ,28. The upper end-of;

' evaporator coil 21 is connected by a conduit 29, i

"'avessel 30, a conduit 3|, the inner'passage of gas heat exchanger 25, and conduit 32'to the top of absorber vessel 22. V

Conduit 3| projects upward inside of vessel an. In the lower part of vessel to there is a pipe coil 33. The upper end of pipe coil 33 is connected by a conduit 34 to the upper end of evap-.- orator coil 21. The lower part of vessel is connected by a conduit 35 to an intermediate part.

of evaporator coil 21. V

The top of stand pipe I3 is connected by a rectifier 36, and a conduit 31 to the upper end of an alr-cooledcondenser coi1'38. The lower'end of condenser coil 38 is connected by a part of concoil33 in vessel 30. The upper end ofconduit i2 is connected to a storage vessel 44. The other end of vessel is connected by a conduit 45 to conduit 3| in the gas circuit.

The above described system contains a solution of refrigerant fluid in an absorption liquid such as a water solution of ammonia, and an auxiliary pressure equalizing fluid such as hydrogen gas.

When burner i8 is lighted so that heat is applied to the generator l0, ammonia vapor is expelled from solution in generator chambers II and I2. Ammonia vapor expelled from solution in chamber l2 rises through stand pipe [3. Vapor expelled from. solution in chamber rises through vapor lift conduit [8 carrying with it liquid from chamber into the upper end of stand pipe It.

Weakened absorption liquid flows from generator chamber l2 through conduit l1, liquid heat exchanger l8, conduit l9, and the lower'end of conduit 20 into the upper end of an absorber coil 2|. Liquid flows downward to the absorber coil 2| absorbing into solution ammonia vapor in the absorber. flows from absorber vessel 22 through conduit 23,

liquid heat exchanger i8, and conduit 24 into generator chamber ll. v

Ammonia vapor flows from the upper end of stand pipe l3 through rectifier 36, and conduit 31 into the upper end of condenser 38. The vaporcondenses to liquid in condenser 38. The liquid flows from the lower end of condenser 38 through a part of conduit 39, conduit 40, vessel 30 and conduit 35 into evaporator 21. Any-un-.,

condensed vapor from condenser 38 flows from the lower end thereof through conduit 39 into the upper end of the second condenser ll. Condensate from condenser 4| flows through conduit 42, conduit 43, coil 33, and conduit 34 into the upper end of evaporator 21. Liquid refrigduit 39 and a. conduit ill to] vessel 30. The up.-'

per end of conduit 39 is connected to the upper end of a second condenser II, The other end of condenser 4| is connected by a part of conduit .42 and a conduit 0 to the lower end of pipe erant flowsdownward in evaporator 21 evapcrating and diffusing into the hydrogen atmosphere, producing a refrigerating effect for cooling the refrigerator storage compartment 28. The gas flows from the upper end of'evaporator 21 through conduit 29 into vessel 30'; Gas flows from vessel 30 through conduit 3|, gas heat ex- I changer 25, and conduit 32 into the: absorber vessel-22. Gas flows from the upper end or absorber 2| through conduit 20, gas heat exchang er 25,;and conduit 2 into the lower end of. evlp-' orator 21. Liquid from thefirst condenser section 38 which enters vessel ll through conduit lll flows over the outside of coil 33. This liquid is cooled by evaporation and diifusion into gas-in vessel ll. This produces cooling of Enriched absorption liquid liquid in coil 33 which is on its way to the evaporator from the upper condenser section 4| as described.

Various changes and modifications may be made within the scope 'of the invention as set forth in the following claims.

What is claimed is:

1. A refrigeration system employing evaporation of refrigerant fluid in the presence of inert gas and having an inert gas circuit including an evaporator and an absorber, a plurality of condensers connected to deliver. liquid to said evaporator at different parts thereof, the liquid flowing from the several condenser sections coming into mutual heat exchange-relation, and the liquid flowing from one of. said condenser sections evaporating in the presence of gas from said circuit between said evaporator and absorber and thereby cooling itself and all the liquid flowing to said evaporator due to said heat transfer relationship. L

2. A refrigeration system employing evaporation of refrigerant fluid in the presence of inert gas and having a circuit'for inert gas including an evaporator and an absorber, a condenser, conduits for conducting liquid from different parts of said condenser to different parts of said evaporator, said conduits coming into mutual heat exchange and one of said conduits holding liquid in the presence of gas in said circuit between said evaporator and said absorber thereby cooling by evaporation takes place both of the liquid itself and the liquid with which it is in heat exchange relation.

3. An. absorption refrigeration system of the type employing evaporation of refrigerant fluid in the presence of inert gas and having a circuit for inert gas including a plurality of evaporator sections and an absorber, a plurality of condenser sections, a chamber in saidcircuit in the path of fiow of gas from said evaporator section to said absorber, aconduit for conducting liquid from one of said condenser sections to one of said evaporator sections and including said chamber,

and aconduit for conducting liquid from another of said condenser sections to another of said evaporator sections and having a part located in part in heat exchange relation with said liquid] holder.

5. A method of refrigeration which includes evaporating liquid refrigerant in the presence of inert gas at a plurality of places, forming liquid refrigerant by condensation of vaporous refriger ant at a plurality of places, conducting liquid refrigerantfrom one of said places of condensation to one of said places of evaporation in a path of,

flow in which the liquid is brought into the presence of gas flowing away from said places .of evaporation and conducting liquid refrigerant from another of said places of condensation to another of said places of evaporation in a path of flow that extends in heat exchange relation with said first path of flow where the liquid in said first path of flow is in the presence of the inert gas.

6. A method of refrigeration by evaporating liquid refrigerant in the prasence'of inert gas. flowing the resulting mixture of refrigerant vapor and gas into the presence of a quantity of liquid refrigerant, bringing another quantity of liquid refrigerant into heat exchange relation with said first quantity of liquid refrigerant, and separately conducting liquid from both of said quantities of liquid refrigerant into the presence of the gas to carry out said first step of evaporating liquid refrigerant in the presence of the gas.

7.. A refrigeration system-having a gas circuit including-an evaporator, a plurality of condenser sections one above the other, a conduit for liquid from an upper condenser section to an upper part of said evaporator, a conduit for liquid from a lower condenser section to a lower part of said evaporator, said conduits having parts in heat exchange relationship and cooled by evaporation of liquid in one of said parts in the presencepf I gas leaving said evaporator.

JOHN TAYLOR. 

